Table 3 The infectivity of An. gambiae s.l. mosquitoes reared on unautoclaved clay and sandy soil substrates obtained from mosquito larval habitats in western Kenya and then co-infected with different gametocyte carriers (mean gametocyte density = 173.8 ± 121.4).

1

48

15.4 (2/13)

21.6 (8/37)

0 (0/56)

2.0

2.1

0

2

16

2.2 (1/45)

9.5 (8/84)

0 (0/38)

2.0

1.6

0

3

32

9.4 (5/53)

27.3 (12/44)

0 (0/51)

1.4

2.0

0

4

32

ND

8.7 (2/23)

0 (0/34)

ND

2.5

0

5

128

40 (2/5)

0 (0/20)

13.9 (16/115)

2.0

0

2.0

6

16

9.7 (3/31)

0 (0/17)

2.8 (3/108)

2.33

0

1.7

7

16

6.9 (2/29)

0 (0/40)

16.1 (5/31)

1.50

0

2.8

8

16

0 (0/14)

0 (0/23)

0 (0/24)

0.0

0

0.0

7.9% (15/190)

10.4% (30/288)

5.3% (24/457)

1.60 ± 0.29

2.06 ± 0.18

1.62 ± 0.59